WO2004004069A1 - Ensemble antenne de reception d'ondes terrestres et technique permettant de regler son gain - Google Patents

Ensemble antenne de reception d'ondes terrestres et technique permettant de regler son gain Download PDF

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Publication number
WO2004004069A1
WO2004004069A1 PCT/JP2003/007415 JP0307415W WO2004004069A1 WO 2004004069 A1 WO2004004069 A1 WO 2004004069A1 JP 0307415 W JP0307415 W JP 0307415W WO 2004004069 A1 WO2004004069 A1 WO 2004004069A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna device
reflector
terrestrial
planar antenna
Prior art date
Application number
PCT/JP2003/007415
Other languages
English (en)
Japanese (ja)
Inventor
Hideaki Oshima
Yoichi Takeda
Original Assignee
Nippon Sheet Glass Company, Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Sheet Glass Company, Limited filed Critical Nippon Sheet Glass Company, Limited
Priority to US10/516,398 priority Critical patent/US20050174289A1/en
Priority to EP03733363A priority patent/EP1548880A4/fr
Priority to JP2004517253A priority patent/JPWO2004004069A1/ja
Publication of WO2004004069A1 publication Critical patent/WO2004004069A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas

Definitions

  • the present invention relates to a terrestrial wave receiving antenna device and a method of adjusting the gain of the antenna device, and more particularly to a terrestrial wave receiving antenna device having an antenna body which is arranged obliquely with respect to a vertical direction, and a gain of such an antenna device. Regarding the adjustment method. Background technology
  • a terrestrial reception antenna device that receives radio waves (vertically polarized waves) from a ground station, it may be necessary to tilt the antenna body from the vertical direction in some cases.
  • An example is the case of a glass antenna for a vehicle. Since the front glass and rear glass of vehicles have a large slope, the antenna body installed on such glass will be inclined from the vertical direction.
  • Figures 1 and 2 show the concept of the decrease in the vertical polarization directivity gain due to the antenna tilt.
  • Fig. 1 when the front glass 12 on which the planar antenna 10 is formed is vertical, if the original effective aperture area of the planar antenna for vertical polarization from the horizontal direction is S I do.
  • the front glass 12 since the front glass 12 is inclined, if the inclination angle (the inclination angle from the vertical direction) is set to 0, the effective opening area in the horizontal direction is SX cos 0 It becomes. In this way, even if the original effective aperture area of the antenna is S, the effective aperture area becomes as small as SX cos 0 for vertical polarization from the horizontal direction by tilting the antenna to 0. .
  • t is the vertical polarization directivity gain in the horizontal direction to decrease Disclosure of the invention
  • An object of the present invention is to provide a terrestrial wave receiving antenna device which does not cause a decrease in directivity gain at the time of receiving vertically polarized waves even when the antenna is installed obliquely from the vertical direction.
  • Another object of the present invention is to provide a gain adjustment method for improving the directivity gain when receiving vertically polarized waves when the antenna is installed obliquely from the vertical direction.
  • an antenna for a vertically polarized wave arriving from the horizontal direction is used by using a reflector arranged in the horizontal direction or at a predetermined angle with respect to the horizontal direction, for the antenna arranged in an inclined manner.
  • the effective aperture area is increased to improve the directivity gain. Further, in this way, the improved directional characteristics in the horizontal plane become almost omnidirectional.
  • a terrestrial wave receiving antenna device for receiving a vertically polarized wave arriving from a horizontal direction wherein the planar antenna is arranged to be inclined from the vertical direction, and a predetermined distance from the planar antenna
  • a terrestrial wave receiving antenna device comprising: a reflector disposed horizontally, or at a predetermined angle with respect to the horizontal direction.
  • the predetermined angle is between 0 and 30 °, preferably 6 °.
  • a second aspect of the present invention is a method of adjusting the directional gain of a planar antenna arranged obliquely from a vertical direction in a terrestrial wave receiving antenna apparatus for receiving a vertically polarized wave arriving from a horizontal direction.
  • the distance between the planar antenna and the reflector is The predetermined distance is selected to be an integral multiple of 0.5 ⁇ .
  • Fig. 1 is a diagram showing the concept of the decrease in the vertical polarization directivity gain due to the antenna tilt.
  • Fig. 2 is a diagram showing the concept of the decrease in the vertical polarization directivity gain due to the antenna tilt.
  • FIG. 3 is a diagram showing one embodiment of the terrestrial wave receiving antenna device of the present invention.
  • FIG. 4 is a diagram showing the arrangement of a planar antenna and a reflector for evaluating the correlation between the distance L and the gain improvement effect.
  • FIG. 5 is a diagram showing the results of evaluating the gain improvement effect from a state without a reflector by placing the reflector at a predetermined angle with respect to the horizontal direction.
  • FIG. 6 is a diagram showing a pattern of a monopole type planar antenna having a resonance frequency of 1.7 GHz.
  • FIG. 7 is a diagram showing a state in which the antenna is installed at an inclination angle of 66 ° and the reflector is installed closest to the lower end of the radiating element.
  • FIG. 8 is a diagram showing the arrangement of the radiating element and the ground conductor.
  • FIG. 9 is a diagram showing the results of comparing the horizontal and vertical polarization directivity gains of the antenna device with the reflector installed and the antenna device without the reflector.
  • Fig. 10 shows the antenna device of the present invention installed on the front glass of a vehicle.
  • FIG. 3 shows an embodiment of the terrestrial wave receiving antenna device of the present invention.
  • the planar antenna 10 is installed on a glass plate 16 inclined at an angle of ⁇ from a vertical direction.
  • the glass plate 16 corresponds to front glass or rear glass.
  • This antenna device for receiving terrestrial waves has a reflector 18 installed below the planar antenna 10 at an angle ⁇ (0 to 30 °) in a horizontal direction or in a direction away from the planar antenna with respect to the horizontal direction. It has.
  • the reflection plate is installed at an angle of 6 ° with respect to the horizontal direction.
  • the mirror image antenna 20 is constituted by the reflector 18 installed at an angle with respect to the horizontal direction, and the effective aperture area for the vertical polarization arriving from the horizontal direction of the antenna is apparently SX cos ⁇ ⁇ Increase more. Thereby, the directivity gain for vertical polarization in the horizontal direction is improved.
  • the reflector 18 to be installed is in the horizontal direction as a target and has no part that interrupts the radiation characteristics, the obtained vertical polarization direction characteristics in the horizontal plane can be made non-directional.
  • the present inventors simulated how the gain improvement effect changes depending on the distance L between the reflector 18 and the planar antenna 10.
  • the distance L indicates the distance from the lower end of the planar antenna to the reflector 18 measured in the vertical direction.
  • Figure 4 shows the arrangement of a planar antenna 10 and a reflector (infinite plane) 22 for performing a correlation evaluation (simulation) between the distance L and the gain improvement effect.
  • the inclination angle ⁇ of the planar antenna 10 with respect to the vertical direction is 60 °.
  • the reflection plate 22 is arranged at an angle of 6 ° with respect to the horizontal direction.
  • Fig. 5 shows the results of evaluation of the gain improvement effect from the absence of the reflector by placing the reflector.
  • the horizontal axis, the distance L of displaying a wave length L of the received radio wave, and the vertical axis represents the average gain variation (d B) c From this correlation evaluation, when the distance L is 0 and 0.5 ⁇ , the average gain change takes a maximum value, and when the distance L is 0, that is, the reflector is installed just below the lower end of the antenna. In this case (however, the antenna and the reflector do not touch each other), the improvement level is about 5 d ⁇ , which indicates that the effect is greatest.
  • the reflector is provided immediately below the antenna or at a position 0.5 mm away from the antenna.
  • the reflector can be installed at a position of an integer multiple of 0.5.
  • FIG. 6 shows a pattern of a monopole type planar antenna 30 having a resonance frequency of 1.7 GHz.
  • the planar antenna 30 is formed on a square glass plate 32 and includes a rectangular ground conductor 34 and an elongated radiating element 36. Feed points 38 and 39 are provided so as to be connected to each of the radiating element and the ground conductor.
  • FIG. 7 shows a state where such a planar antenna 30 is installed at an inclination angle of 66 ° and the reflector 40 is installed at an angle of 6 ° with respect to the horizontal direction.
  • the radiating element 36 or the ground conductor 34 is provided as shown in FIG. 7 depends on, for example, the installation position on the window glass of the vehicle.
  • FIG. 8 shows a planar antenna 44 provided with a ground conductor 34 on the side close to the reflector 40. Therefore, the distance L is the distance between the lower end of the ground conductor 34 and the reflector 40.
  • the reflector 40 is arranged closest to the lower end of the ground conductor 34, and the reflector shown in FIG. Figure 9 shows the results of comparison of the horizontal and vertical polarization directivity gains for the case where the plate 40 is not installed.
  • the average gain was -7 dB when the reflector was not used, and 1 dB when the reflector was used. It can be seen that the use of the reflector improves the directional gain of horizontal and vertical polarization by 8 dB on average. Also, it can be seen that good omnidirectional characteristics are obtained.
  • the above-described planar antenna is provided on the inner surface of a window glass (for example, front glass or rear glass) which is inclined, and the lower surface of the planar antenna is provided.
  • a reflection plate is provided on the side.
  • FIG. 10 shows a position where the antenna device of this embodiment is installed on the front glass 42 of the vehicle.
  • the radiating element 36 should be on the side of the reflector 40, and on the lower inside of the front glass 42.
  • the ground conductor 34 should be located on the reflector 40 side as shown in FIG.
  • the mirror image antenna is formed by the reflector installed in the horizontal direction or at a predetermined angle with respect to the horizontal direction, and thereby the antenna effective aperture for the vertical polarization arriving from the horizontal direction is obtained.
  • the area can be increased. Therefore, even when the antenna is tilted, with respect to vertically polarized waves arriving from the horizontal direction toward and therefore c can be secured large directivity gain, even if the antenna is installed to be inclined from the vertical direction - vertically polarized It is possible to realize a ground wave receiving antenna device that does not cause a decrease in the directivity gain at the time of wave reception.
  • a gain adjustment method for improving the directivity gain at the time of vertical polarization reception at the time of placement can be realized.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Cette invention a trait à un ensemble antenne recevant des ondes terrestres, sans préjudicier au gain de directivité, et recevant également des ondes polarisées verticalement et ce, même si l'antenne est installée avec une certaine inclinaison par rapport à la verticale. Cet ensemble antenne comprend une antenne plane inclinée par rapport à la verticale ainsi qu'une plaque réfléchissante, placée à une distance prédéterminée de la plaque plane et positionnée à l'horizontale ou inclinée selon un angle prédéterminé par rapport à l'horizontale. Cette plaque réfléchissante se trouve, autant que possible, à proximité de l'antenne plane ou séparée de celle-ci d'une distance égale au multiple de 0,5μ, μ représentant la longueur d'onde d'une onde terrestre reçue par l'antenne plane.
PCT/JP2003/007415 2002-06-11 2003-06-11 Ensemble antenne de reception d'ondes terrestres et technique permettant de regler son gain WO2004004069A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/516,398 US20050174289A1 (en) 2002-06-11 2003-06-11 Terrestrial wave receiving antenna device and antenna gain adjusting method
EP03733363A EP1548880A4 (fr) 2002-06-11 2003-06-11 Ensemble antenne de reception d'ondes terrestres et technique permettant de regler son gain
JP2004517253A JPWO2004004069A1 (ja) 2002-06-11 2003-06-11 地上波受信用アンテナ装置およびアンテナ利得の調整方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-169467 2002-06-11
JP2002169467 2002-06-11

Publications (1)

Publication Number Publication Date
WO2004004069A1 true WO2004004069A1 (fr) 2004-01-08

Family

ID=29996448

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/007415 WO2004004069A1 (fr) 2002-06-11 2003-06-11 Ensemble antenne de reception d'ondes terrestres et technique permettant de regler son gain

Country Status (4)

Country Link
US (1) US20050174289A1 (fr)
EP (1) EP1548880A4 (fr)
JP (1) JPWO2004004069A1 (fr)
WO (1) WO2004004069A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8499462B2 (en) * 2006-04-10 2013-08-06 The Gillette Company Cutting members for shaving razors
US8011104B2 (en) * 2006-04-10 2011-09-06 The Gillette Company Cutting members for shaving razors
CN102394378B (zh) * 2011-11-01 2014-01-22 东南大学 高增益垂直极化全金属扇区天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01295505A (ja) * 1988-02-23 1989-11-29 Sanyo Electric Co Ltd アンテナ装置
JPH02253702A (ja) * 1989-03-28 1990-10-12 Japan Radio Co Ltd マイクロストリップアンテナ
JPH0582113U (ja) * 1992-02-05 1993-11-05 日本板硝子株式会社 窓ガラスアンテナおよび窓ガラスアンテナ装置
JPH07273526A (ja) * 1994-03-30 1995-10-20 Nippon Sheet Glass Co Ltd 自動車用窓ガラスアンテナ
JPH0983242A (ja) * 1995-09-13 1997-03-28 Sharp Corp 小型アンテナおよび光ビーコン、電波ビーコン共用車載フロントエンド

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235590B (en) * 1989-08-21 1994-05-25 Radial Antenna Lab Ltd Planar antenna
US5568156A (en) * 1992-10-09 1996-10-22 Asahi Glass Company Ltd. High frequency wave glass antenna for an automobile
US5734350A (en) * 1996-04-08 1998-03-31 Xertex Technologies, Inc. Microstrip wide band antenna
DE19841187C1 (de) * 1998-09-09 2000-02-10 Hirschmann Richard Gmbh Co Mobilfunkantenne
EP1351335A1 (fr) * 2000-12-07 2003-10-08 Asahi Glass Company Ltd. Dispositif d'antenne
US6919853B2 (en) * 2002-03-04 2005-07-19 M/A-Com, Inc. Multi-band antenna using an electrically short cavity reflector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01295505A (ja) * 1988-02-23 1989-11-29 Sanyo Electric Co Ltd アンテナ装置
JPH02253702A (ja) * 1989-03-28 1990-10-12 Japan Radio Co Ltd マイクロストリップアンテナ
JPH0582113U (ja) * 1992-02-05 1993-11-05 日本板硝子株式会社 窓ガラスアンテナおよび窓ガラスアンテナ装置
JPH07273526A (ja) * 1994-03-30 1995-10-20 Nippon Sheet Glass Co Ltd 自動車用窓ガラスアンテナ
JPH0983242A (ja) * 1995-09-13 1997-03-28 Sharp Corp 小型アンテナおよび光ビーコン、電波ビーコン共用車載フロントエンド

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1548880A4 *

Also Published As

Publication number Publication date
US20050174289A1 (en) 2005-08-11
EP1548880A1 (fr) 2005-06-29
JPWO2004004069A1 (ja) 2005-11-04
EP1548880A4 (fr) 2005-11-09

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